Edges in the graph represent flow of control from one statement (or block) to another.
图的弧边表示从一个语句(或块)到另一个语句或语句块的控制流。
2
After tracing and analyzing the geometric structure of control system block diagram, thereby the corresponding topological structure is generated by graph analyzer.
图形分析器通过对控制系统方框图的几何结构进行跟踪探索和结构分析，生成相应的拓扑结构。
3
However, in finding the solution of transfer function ofblock diagram, Mason Gain Formula can only be used after translating block diagram into signal flow graph.